Exactly. The parent casually asserts a difference in a measurement that doesn’t apply to humans. We can’t usually disengage to a safety driver. The comparison is not meaningful.

Parent comment compares human crash rate (1/300,000 miles) to self-driving disengage rate (1/10,000 miles). With the assumption that the self-driving system would have crashed had the safety driver not intervened (a reasonably safe assumption, given the purpose of having a safety driver in the first place), this seems like a meaningful apples-to-apples comparison to me.

I don't think that the general human crash rate is appropriate to compare. It makes more sense to compare, say, a professional bus driver.

As it happens, my uncle drove for a living and I recall he had a plaque for a million miles without an accident.

Or "Jesus, take the wheel!"